Omega Products DRA-WVT-3-1A User Manual
To Order
(Specify Model Number)
Input Output Output Power
Model No. Price Input Freq* Watt** VAR** Required
ac Watt/Var (Single Phase)
DRA-WVT-3-1A $445 115 Vac/5A 60 Hz 4-20 mA 4-20 mA 115 Vac
DRA-WVT-3-1B 445 230 Vac/5A 60 Hz 4-20 mA 4-20 mA 115 Vac
DRA-WVT-3-1C 445 115 Vac/5A 60 Hz 4-20 mA 4-20 mA 230 Vac
DRA-WVT-3-1D 445 230 Vac/5A 60 Hz 4-20 mA 4-20 mA 230 Vac
DRA-WVT-3-1E 445 115 Vac/5A 60 Hz 12±8 mA 12±8 mA 115 Vac
DRA-WVT-3-1F 445 230 Vac/5A 60 Hz 12±8 mA 12±8 mA 115 Vac
DRA-WVT-3-1G 445 115 Vac/5A 60 Hz 12±8 mA 12±8 mA 230 Vac
DRA-WVT-3-1H 445 230 Vac/5A 60 Hz 12±8 mA 12±8 mA 230 Vac
ac Watt/Var (3-Phase 3-Wire)
DRA-WVT-3-3A 485 115 Vac/5A 60 Hz 4-20 mA 4-20 mA 115 Vac
DRA-WVT-3-3B 485 230 Vac/5A 60 Hz 4-20 mA 4-20 mA 115 Vac
DRA-WVT-3-3C 485 115 Vac/5A 60 Hz 4-20 mA 4-20 mA 230 Vac
DRA-WVT-3-3D 485 230 Vac/5A 60 Hz 4-20 mA 4-20 mA 230 Vac
DRA-WVT-3-3E 485 115 Vac/5A 60 Hz 12±8 mA 12±8 mA 115 Vac
DRA-WVT-3-3F 485 230 Vac/5A 60 Hz 12±8 mA 12±8 mA 115 Vac
DRA-WVT-3-3G 485 115 Vac/5A 60 Hz 12±8 mA 12±8 mA 230 Vac
DRA-WVT-3-3H 485 230 Vac/5A 60 Hz 12±8 mA 12±8 mA 230 Vac
U ± 0.1% Accuracy
U Galvanically Isolated
U Two Simultaneous
Outputs for Watt
and VAR
U Single Phase & Three
Phase Models
* Consult engineering for 50 Hz and 400 Hz models.Comes with complete operator’s manual.
** Models with ±1mA or ±20mA outputs are also available. Consult engineering.
Ordering Example: DRA-WVT-3 to 3A 3-phase, 3-wire watt/VAR transducer,
115 Vac/5A 60 Hz input, 4-20 mA outputs for watt and VAR, 115 Vac power, $485.
$
445
Basic Unit
The DRA-WVT-3 Series combines
watt and VAR transducers in one
compact housing. Two
simultaneous proportional dc
current outputs are provided for
watt and VAR parameters. The
polarity of the watt output is
positive for unity power factor (PF);
polarity for the VAR output is
positive for lagging power factor.
Specifications
GENERAL
Accuracy: ±0.1% of span typical
for watt in 5-140% range
Temperature Stability:
< ±0.01%/°C
Response Time: < 200 millisecond
(10-90% of span)
Power Supply: 115 Vac -15/+25%,
230 Vac -15/+25%, 60Hz
Power Overload: withstands 1.45 x
nominal rating continuous
Input Current Consumption:
0.26 VA @ 5 Aac
Input Voltage Consumption:
0.15 VA @150 Vac, 0.3 VA
@ 300 Vac
Frequency: 60 Hz
Frequency Variation Effect:
< ±0.02%/Hz (for watt output)
Operating Ambient: 23 to 149°F
(-5 to 65°C); 5 to 95% RH,
noncondensing
Storage Temperature: -31 to
185°F (-35 to 85°C)
Enclosure: polycarbonate
Mounting: standard 35 mm DIN rail
or wall mount
Dimensions: 2.87"H x 3.94"W x
4.41"D (73 x 100 x 112 mm)
Weight: 1.3 lb (0.6 kg)
INPUTS
Connection: single phase or
3-phase, 3-wire
Power Factor: unity-to,
lead or lag, zero
Power Calibration Span: ±170 to
±10,000 watt/var
Overrange: +42% (at full accuracy)
Combined Watt/Var Transducers
DRA-WVT-3 Series
Isolation: 2 KV RMS/1 minute for
voltage and power inputs; 4 KV for
current inputs
CURRENT INPUTS
Current Span: 5 Aac
Current Overrange: +20%
(at full accuracy)
Peak Overload: 40 Aac RMS for
5 seconds every 10 minutes
VOLTAGE INPUTS
Voltage Span: 115 Vac, 230 Vac
Voltage Overrange: +20%
(at full accuracy)
Voltage Overload: 1.6 x nominal
rating continuous, 600 Vac max
OUTPUTS (WATT & VAR)
Output Configuration: unipolar or
bipolar current
Output Span: 4-20 mA, 12 ± 8 mA
Maximum Output Load: Rmax
(KOhms) = 16/Iout (mA)
Output Impedance: Z (KOhms) =
0.1 x Vo (Vdc)
Load Variation Effect: < ±0.03%
(for full change)
H-69
SM
OMEGA
CARE
Extended Warranty
Program
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